Asbestos didn’t vanish when its hazards became
clear. It still lingers in old buildings, shipyards, rail
cars, and machinery, quietly waiting to be disturbed.
The danger isn’t in touching it, but in breathing it.
When asbestos fibers break loose, they float through
the air, invisible yet deadly, embedding deep in the
lungs and tissues.
According to Medscape, a 2024 study found that
occupational asbestos exposure caused 239,330
deaths worldwide in 2019. It also resulted in 4,189,000
disability-adjusted life years (DALYs). Over the three
decades from 1990 to 2019, deaths linked to
workplace asbestos exposure increased by 65.65%
globally.
Those numbers tell a grim story. Even decades after its peak use, asbestos continues to claim the lives
of people who were simply doing their jobs.
How asbestos enters the body at work
Asbestos fibers become dangerous when they become airborne. Once airborne, fibers are inhaled or,
less commonly, swallowed. Inhalation is the main route for occupational disease. Fibers reach the deep
lung and pleura, lodging for years. The body cannot easily clear them. Persistent fibers cause
inflammation, scarring, and cellular damage. Over time, this process can evolve into malignancies such
as mesothelioma and lung cancer.
Because asbestos-related diseases take decades to develop, most current cases reflect exposures that
happened long ago. According to the Cleveland Clinic, symptoms may not appear for 20 to 30 years or
even longer after initial contact with asbestos. This long latency period makes tracing the source of
exposure extremely difficult.
Many companies that once used asbestos have since closed, taking vital employment and safety records
with them. As a result, countless cases of lung cancer, mesothelioma, and other asbestos-related
illnesses are either misdiagnosed or never linked to occupational causes.
How Asbestos Exposure Triggers Cancer: The Biology in Brief
Asbestos fibers pierce and irritate cells in the lung and pleura. The irritant response is chronic.
Macrophages fail to clear long, thin fibers. That failure triggers persistent inflammation. Inflammation
releases reactive molecules that damage DNA.
Fibers also physically damage cells and promote abnormal repair. Over the years, these processes
cause mutations and uncontrolled growth. Certain fiber types - amphiboles like crocidolite are especially
carcinogenic. Smoking multiplies the risk for lung cancer in exposed workers. The combination is lethal
for some.
Key occupations with elevated asbestos-related cancer risk
Certain jobs carry a much higher risk of asbestos exposure, putting workers on a direct path toward
serious, often fatal cancers.
Construction and demolition workers
Construction workers often handle insulation, roofing, flooring, and pipe coverings containing asbestos.
During demolition or renovation, these hidden fibers are released into the air. A real example came from
Tooele City, Utah, where the demolition of the old Broadway Hotel left behind piles of asbestos-laden
debris.
According to The Salt Lake Tribune, the site’s owner was fined $40,000. Prosecutors found that workers
were cleaning the rubble with only dust masks and water sprays. These unsafe methods spread
asbestos fibers instead of containing them.
This incident highlights how quickly routine demolition can become hazardous when safety rules are
ignored. Carpenters, roofers, and laborers face these risks daily, especially on older sites where
asbestos remains hidden behind walls, tiles, and insulation.
Railroad workers
According to JD Supra, railroad employees have long faced some of the highest occupational cancer
rates in the country. Over a 38-year span, more than 4,800 lung cancer deaths were recorded among
them. For decades, railroads relied on asbestos in brake linings, gaskets, insulation, and steam systems.
During routine repairs, mechanics and crew members unknowingly released clouds of asbestos fibers.
They spent years inhaling toxic dust mixed with diesel exhaust, silica, and welding fumes.
Now, the health toll is catching up, as noted by Gianaris Trial Lawyers. In recent years, former railroad
workers have filed lawsuits over not just lung or mesothelioma cases, but also more complex conditions
like esophageal cancer.
workplaces were safe, only to discover decades later that those same environments were slowly
poisoning them.
Shipyard and marine workers
Shipbuilders installed asbestos throughout vessels for its heat resistance and soundproofing properties.
It lined boiler rooms, engine spaces, and extensive pipe systems, areas where temperatures soared and
insulation was essential. But that same insulation turned deadly.
When ships were built, repaired, or dismantled, asbestos fibers were released in dense clouds that filled
the confined spaces below deck. Workers often labored for hours without proper masks or ventilation,
unknowingly breathing in the fine dust that clung to their clothes and skin.
Over time, these exposures led to alarming rates of mesothelioma, lung cancer, and asbestosis among
shipyard workers. Even decades later, retired shipbuilders continue to face the delayed health
consequences of what was once considered a harmless and indispensable material.
Industrial and Mechanical Trades
Many industrial and mechanical trades carried extreme asbestos exposure risks. Miners and mill workers
faced the highest levels, surrounded by airborne fibers that coated their skin, tools, and clothes. Each
shift meant breathing in dense dust that accumulated in their lungs over the years.
Pipefitters, boilermakers, and insulators weren’t far behind. They regularly cut and fitted asbestos-
wrapped pipes and boilers, often inches from their faces. Even short but repeated exposures added up to
lifelong health consequences.
Grinding or replacing these parts in confined workshops sends invisible fibers into the air, elevating the
risks.
FAQs
How can workplaces prevent asbestos exposure?
Workplaces should identify and label asbestos-containing materials before any renovation or demolition
begins. Proper ventilation, wet methods to suppress dust, and approved respirators are essential.
Regular training ensures workers know how to handle or avoid asbestos safely.
What government agencies regulate asbestos?
In the U.S., the EPA and OSHA oversee asbestos safety. The EPA sets rules for handling, removal, and
disposal, while OSHA enforces workplace exposure limits. Both require proper training, labeling, and
protective measures. These agencies work together to minimize risks for workers and the public.
Is it safe to remove asbestos on your own?
No, removing asbestos yourself is highly dangerous. Disturbing it releases microscopic fibers that can be
inhaled, increasing the risk of lung cancer, mesothelioma, and other respiratory diseases. Only certified
professionals have the proper protective gear, containment procedures, and training to safely remove or
manage asbestos.
Overall, asbestos no longer shines as a modern material. It remains deadly where it persists.
Construction crews, shipyard laborers, railroad mechanics, miners, and many other occupations still
carry disproportionate cancer risks. The Medscape numbers show a global rise in occupational deaths
from asbestos.
That trend is avoidable. With proper controls, training, and policy, new cases can drop. What this really
means is clear: exposure is preventable, but only if employers, regulators, and workers treat asbestos
with the urgency it deserves.